I agree it does sound super defeating. I'm just still stuck on what to do yk? do I quarantine with copper or do nothing and feed them really well and cross my fingers, etc.Know a lot of people that have basically lived with ich in the tank forever. Just low stress tanks.
Not suggesting that by any means, just the thought of having a fallow tank for months seems super defeating to me.
I'd probably go FOWLR and run a lower gravity and possibly low level of copper.